I had a positive high school education and experience, for the most part.
I went to my 10th H.S. reunion and had a lot of fun, it was very informal and everyone was in good spirits and pretty nice to one another.
My 20th reunion was this summer past and I didn't get to it; I wasn't feeling it and I had a number of other things going on around the same time, so I didn't make the effort. I would go again though, if it were convenient.
I am from a small town and a small graduating class, I maintain relationships with a handful of my former classmates and teachers but the rest I'm happy to see on facebook or every 10-20 years, at my leisure.